1
1
Service
Service
Control inputs
SYSTEM PUMP SPEED CONTROL
GAS PRESSURE SWITCH
DHW THERMOSTAT
ROOM THERMOSTAT /
ZONE CONTROL
FLOW SWITCH
SYSTEM SENSOR
OUTDOOR SENSOR
SEQUENCER / BUILDING
MANAGMENT SYSTEM
LOW WATER CUTOFF
HEAT EXCHANGER SWITCH
INLET TEMPERATURE
SENSOR
OUTLET TEMPERATURE /
HI-LIMIT SENSOR
FLUE GAS SENSOR
AIR PRESSURE SWITCH
LOUVER PROVING SWITCH
FLAME SENSOR
BLOCKED DRAIN SWITCH
DISPLAY PANEL
PC INTERFACE
8
O-TEMP
Service Manual
LOW VOLTAGE
CONNECTION
BOARD
SMART CONTROL
MODULE
IMG00006